Validators
XML Validator
Validate XML syntax and structure instantly to identify unclosed tags or attribute errors. Get detailed diagnostics and line-by-line feedback to ensure your data is well-formed and ready for production.
Validate XML syntax and structure instantly to identify unclosed tags or attribute errors. Get detailed diagnostics and line-by-line feedback to ensure your data is well-formed and ready for production.
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Tip
Always ensure your XML root element contains all other elements to maintain a valid tree structure.
Did You Know?
XML is case-sensitive, meaning <User> and <user> are treated as completely different tags.
<item> needs </item>)<Tag> and <tag> are treated as different elements<a><b></a></b> is considered invalid syntax< and & must be escaped as entities like < and &Best Practice
Use CDATA sections for blocks of text containing characters that would otherwise need escaping.
<?xml version="1.0" encoding="UTF-8"?> for maximum compatibilityQ: What does 'well-formed' mean in XML? A: A well-formed XML document adheres to the basic syntax rules of XML, such as properly nested and closed tags.
Q: How do I find the exact location of a syntax error? A: Our validator provides the line and column number, and you can click the error message to jump directly to the code location.
Q: Can I validate against a DTD or XSD? A: Currently, this tool focuses on well-formedness and syntax checking to ensure the code can be parsed correctly by any XML reader.
Q: Does this validator support XML namespaces? A: Yes, it will check the syntax of namespace declarations and prefixed elements to ensure they follow standard XML rules.
Tip
Pre-validate XML before sending it to an API to avoid 400 Bad Request responses.